Paper manufacture



.J une 13, 1933.

J. TRAQUAIR PAPER MANUFACTURE Filed April 18, 1930 Patented June 13, 1933 i UNITED STATES PATENT oFFlcE JOHN TRAQUAIB, OF CHILLICOTHE, OHIO, ASSIGNOB T0 THE HEAD RESEARCH yENGI- NEERING COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO PAPER. MANUFACTUBE Application led April 18.

This invention relates to the manufacture of paper, and particularly to the machenical disintegration of fibrous materials 1n the production of pulp.

One of the principal objects of the 1nvention is to provide a method of mechanically disintegrating fibrous material with a pounding treatment, which permits 'of treatment at high consistency or low moisture content of the fibrous material, gives a treated material of superior characteristics, and is easily carried out and controlled.

Another object of the invention is the provision of apparatus for carrying out this method including a disintegrating mlll which is simple in construction, of large capacity, adapted to uniformly reduce fibrous materials to ,the desired degree, and is highly efective and economical in operation.

Other objects and advantages of the invention will be apparent from the following description, the accompanying drawing and the appended claims.

In the drawing, which discloses a preferred embodiment of the invention- Fig. 1 is a plan view of a rod mill constructed 'in accordance with this invention; Fig. 2 is a vertical sectional view taken on the plane of the line 2--2 of Fig. 1;

Fig. 3 is a transverse sectional view taken on the plane of the line 3-3 of Fig. 1; and Fig. 4 is a side elevational view of a modified form of rod mill. l

Referring to the drawing, in which like characters of reference deslgnate like parts in the several views thereof, a disintegrating mill. is illustrated in Figs. 1 to 3 having a' rotatable cylindrical casing or shell 10 to which end members 11 are attached. The shell is preferably provided with a conventional-type of lining 10. Projecting axially from each end member 11 is a hollow journal 12, the several journals 12 being supported for rotational movement within bearings 13 carried by upstanding sup orting members 14 mounted on a suitable oundation. As shown, the casing is rotated by means of a ring gear 16 attached to shell 10 and meshing with a driving pinion 17 secured to a rotatable shaft 18. The pinion 1930. Serial No. 445,338.

and shaft are supported by means of bearings 19 in proper relation to the ring gear 16 andare adapted to be rotated by suitable source of power (not shown).

Feeding inlets 20 are provided at each end of the casing for the introduction of material which is to be treated. The inlets are preferably provided within the journals 12 which are made hollow to permit passage of the fibrous material 0r stock to the interior of the casing. Feeding means, such as the stationary chutes 21, are positioned for directing material into the feeding inlets. Each chute 2l has an open upturned outer end adapted to receive fibrous material discharged therein from any suitable source of supply, such as a traveling conveyor (not shown) and an inner end which fits within the journal 12, the chute 21 being held against rotation by a detachable connection with a bracing arm 15 carried by the bearing sup ort 14. Positive feeding means, such as t e screw 21', or fluid pressure means such as an air blast, are preferabl provided for the inlets 20 to assist the ceding of material to the mill.

A plurality of disintegrating members 22 are provided within the casing. These members 22 are preferably round metal rods of considerable weight which extend substantially throughout the length of the casing 10, and are ree to roll and cascade over one another by gravity as the casing is rotated. The rods 22 are carried around with the casing as it rotates until the angle of repose is exceeded, at which time the uppermost rods, roll freely to the lower side of the casi'n and in doing so pound and disintegrate t e material under treatment. A discharge for the treated material is provided in the periphery of the shell 10 intermediate the feeding inlets so that the treated material travels from opposite ends toward the discharge. As shown, the casing 10 has a plurality of slots or ports 24 which are spaced to leave suicient metal therebetween to give desired strength. The dischar e openings 24 may be formed in an integrapart of the casing wall or a separate strengthening portion having discharge tion of the mill.

slots maalso be provided at this discharge area.. he discharge is preferably located substantially centrally of the feeding inlets 20, and the slots are of suliicient size to pers mit the passage of the disintegrated material therethrough with the desired ca lcity. For example, 1n a mill 12 to 16 eet 1n length and having a diameter of 6 to 8 feet, slots about one foot in length and having a width of about-2 to 6" give satisfactory results with paper pulp stock of high consistency, such as 10% and over. llt is .of course to be understood that the area of the slots may vary over a considerable range depending upon the character of the material being treated and the desired rate of discharge. These slots are preferably arranged in stagered relationship as shown to prevent unue weakening of the metal shell. 'llhese if@ slots may be arranged diagonally as shown,

or in other suitable arrangement so that the strength of the shell is not unduly decreased. .lo assist the discharge of material, the lining is preferably omitted at the discharge 53@ area to provide a pocket 25 opposite the slots so that the rods 22 will not close the openings of the slots. A collecting means, such as the funnel shaped chute 28, positioned beneath the discharge receives the 8@ treated stock which falls from the discharge openings., from where it may be conveyed for further processing.

Additional support for the casing 10 may be provided by means of supporting bands 53@ 30 attached to the periphery of the casing preferably toward the central portion thereof adjacent the discharge slots. rlrunnion rollers 31 journaled in brackets 32 mounted upon the supporting foundation rotatably 4'@ receive the bands 3() to carry a portion of the weight of the mill.

The present form of disintegrating rod mill is found to edectively treat pulp stock at higher consistency than has heretofore been the practice with the conventional rod 55 present invention, fibrous material or stock at a consistency materially in excess of 10% is subjected-to a pounding treatment between parallel pounding surfaces of a plurality of elongated pounding elements which w freely roll over each other in intermingled contact with the material. The material is continuously introduced adjacent the end of the plurality of pounding elements, and is contmuously removed intermediate the 05 ends thereof, preferably substantially centrally thereof, this removal being effectively secured and assisted by the ressure of the pounding action of the rods orcing the material throu h the discharge. A gradient of stock is ormed sloping from the upper feeding end downwardly to the peripheral discharge, as indicated at 34, and the agitation of the mill coupled with the feeding of fresh material thereto secures the desired travel of the material down the gradient to the discharge. Preferably stock is uniformly fed in adjacent opposite ends of the pounding elements and moves toward the common peripheral discharge in downwardly sloping converging paths.

As the rods 22 extend throughout the length of the casing and are supported somewhat upon the stock which is uniformily fed into the rod mill at each end of the casing, the rods are maintained properly aligned in parallel relationship during operation. 'lhe present invention permits larger' quantities of material to be passed through the mill per unit of time, thus increasing the capacity of the mill; at the same time stock at high density is more effectively treated and disintegrated. The necessity of diluting the stock for the disintegrating treatment, as well as the necessity for concentrating or dewatcring the treated stock is avoided. A saving in time,` materials, and power consumption is obtained, and a superior pulped or treated material is produced. The higher consistency material being treated serves in a measure as a resilient support for the rods, preventing objectionable free falling action such as may take place in dilute stock, and thereby giving a more edective treatment of the fibrous material without objectionable cutting and breaking of the fibers themselves, while at the same time wear on the mill is reduced providing longer life thereof.

ln the form of rod mill illustrated in Fig. 4, the casing comprises two cylindrical portions 10 of substantially equal length which are positioned end to end and are spaced from one another. The adjacent ends of the casings have secured thereto annular angle irons 35 having upstanding flanges 36 held in spaced relation by means of spacing members 37 which extend therebetween. The spacing members 37 are preferably made hollow in the form of sleeves and vclamping bolts 38 are provided which exlOll preferably fastened to eacli portion 10 of the cylindrical casing, and driven by pinions 17' on'driving shafts 18 which are s nchroni'zei'l to operate in unison so that t e casing is driven at each end at the same speed. Where a synchronized drive of this character 'is used, it is not essential that the spaced casings be rigidly connected with each other, as any slight variation in driving rates is compensated by the slip of the rods which extend into both casings.

While the method herein described, and the forms of apparatus for carrying out that method, constitute referred embodiments of the invention, it 1s to be understood that the invention is not limited to this precise method or these precise forms of apparatus, and that changes may be made therein without departing from the/scope of the invention which is defined in the appended claims.

What is claimed is: f

1. In the manufacture of pulp from brous material, the method which comprises continuously introducing the fibrous material adjacent the end of a lurality of parallel elongated pounding e ements, subJecting the material to a pounding treatment between parallel pounding surfaces of the plurality of elongated pounding elements which freely roll over each other in intermingled contact with the material, and continuously removing treated material intermediate the ends of the elements.

2. In the manufacture of pulp from iibrous material, the method which comprises continuously and simultaneously introducing the fibrous material adjacent opposite ends of a plurality of arallel elongated pounding elements, subjecting the material to a pounding treatment between parallel pounding surfaces of the plurality of elongated pounding elements which freely roll over each other in intermingled contact with the material, and continuously removing treated material intermediate the ends of the elements.

3. In the manufacture of pulp from fibrous material, the method which comprises continuously and simultaneously introducing the fibrous material at a consistency materially in excess of 10% adjacent opposite ends of a plurality of parallel elongated pounding elements, subjecting the material to a poundin treatment between parallel pounding sur aces of the plurality of elongated pounding elements which freely roll over each other in intermingled contact with the material, and continuously removing treated material intermediate the ends of the elements, the fibrous material traveling in downwardly inclined and converging paths to the intermediate removal, the material being uniformly introduced adj acentthe opposite ends of the elements to thereby maintain the elongated pounding elements in desired parallel relationship.

4. A device of the character described, comprising a rotatable casing, a plurality of disintegrating members therein, a plurality of stock feeding inlets for said casing, and a normally open common discharge for said casing intermediate said feeding inlets for the discharge and mixing of material received from said plurality of feeding inlets.

5. A device of the character described, comprising a rotatable cylindrical casing, a plurality of elongated disintegrating members extending longitudinally of said casing,

a plurality of stock feeding inlets for the continuous supply of stock to said casing, and a peripheral discharge positioned intermediate said feeding inlets and intermediate opposite ends of said elongated disintegrating members` for the continuous discharge of stock from said casing.

6. A device of the character described, comprising a rotatable casing, end cover members at opposite ends of said casing, a stock feeding inlet in each of said end cover members, a plurality of elongated freely tumbling disintegrating members Within said casing extruding longitudinally of said casing, and a normally open common discharge for said casing positioned intermediate said feeding inlets and intermediate opposite ends of said elongate disintegrating members.

7. A device of the character described, comprising a rotatable cylindrical casi-ng, a plurality of elongate freely tumbling disintegrating rods provided therein and extending substantially throughout the length of said casing, a plurality of feeding inlets for said casing adjacent opposite ends of said casing, said casing having a plurality of normally open spaced peripheral discharge openings positioned intermediate said feeding inlets and intermediate opposite ends of said rods.

8. A device of the character described,

comprising a rotatable cylindrical casing, a plurality of elongate freely tumbling disintegrating rods provided therein, a plurality of feeding inlets for said casing adjacent opposite ends of said casing for the continuous supply of fibrous material to said casing, said casing having a plurality of spaced peripheral discharge openings substantially -midway between said feeding inlets forthe continuous discharge of fibrous material from said casing, said openings being arranged in staggered relationship.

9. A device of'the class described, comprising a pair of connected rotatable casings, said casings being positioned end to end, a plurality of elongated disintegrating members Within said casings and extending therethrough, a feeding inlet for each casing, and a common peripheral discharge for said casings.

10. A device of the class described, comprising a pair of connected rotatable casings, a plurality of disintegrating rods within said casings and extending therethrough, a feeding inlet for each casing, said casing being positioned end to end in spaced relation to provide a common peripheral discharge for said casings positioned therebetween and intermediate said feeding inlets.

11. A rod mill of the character described, comprising a pair of spaced rotatable casings positioned end to end, a plurality of disintegrating rods provided therein and extending thercthrough, a feeding inlet for each casing adjacent the outer end thereof.,

means connecting said casings, and a common discharge in said connecting means, said discharge being positioned intermediatesaid feeding inlets.

l2. A rod mill of the character described, comprising a pair of spaced rotatable casings positioned end to end, a plurality of disintegrating rods provided therein and eX- tending therethrough, a feeding inlet for each casing, means connecting said casings in rigid alignment, and a common discharge in said connecting means, said connecting means comprising upstanding flanges secured to the adjacent ends of said casings spacing members extending between sai flanges, and fastening means securing said flanges together with said spacing means therebetween.

13. A mill of the character described, comprising a rotatable elongated casing, a plurality of disintegrating members therein, trunnion supports for rotatably supporting said casing, rotating means for said casing independent of said trunnion supports adjacent opposite ends of said casing, and a synchronized drive for said rotating means.

14. A mill of the character described, comprising a rotatable elongated cylindrical cas-A ing, a plurality of disintegrating rods therein, trunnion supports for rotatably supporting said casing, ring gears fastened to said casing adjacent opposite ends thereof, and a synchronized drive for both of said ring gears for driving said casing independently of said trunnion supports.

15. A mill of the character described, comprising a pair of cylindrical rotatable casings positioned end to end in spaced relationship providing for a common stock discharge, a plurality of disintegrating rods therein and extending within both casings, rotating means for each casing, and a synchronized drive for both -of said rotating means.

16. A mill of the character described, comprising a pair of cylindrical rotatable casings positioned end to end in spaced relationship to provide a common discharge talaa therebetween, aplurality of disintegrating members extending into both casings, feed-v,

ing inlets for the opposite ends of said casings, rotating means for each casing, and a synchronized drive for said rotating means.

A mill of the character described, comprising a rotatable elongated casing, a plurality of `disintegrating members therein, a stock feeding inlet adjacent each end of said casing, said casing having a peripheral stock discharge intermediate said feeding inllets, trunnion supporting means for said casing and strengthening means for said casing adjacent said discharge, said strengthening means serving as bearing tracks for rotatably supporting said casing on said trunnion supporting means.

l8. A mill of the character described, comprising a rotatable elongated cylindrical casing, a plurality of elongate disintegrating members therein and extending substantially throughout the length of said casing, a stock feeding inlet adjacent each end of said casing, said casing having a peripheral stock discharge intermediate said feeding inlets and intermediate opposite ends of said elongate disintegrating members, strengthening bands for said casing adjacent and on opposite sides of said discharge, and trunnion supporting means for said bands.

19. A mill of the character described, comprising a rotatable cylindrical casing having a lining, a plurality of disintegrating rods therein, a feeding inlet adjacent each end of said casing, said casing having a peripheral discharge intermediate said feeding inlets, said lining being broken away opposite said discharge to provide a pocket preventing said rods from closing said discharge.

20. In the manufacture of pulp from fibrous material, the method which comprises introducing fibrous material adjacent opposite ends of a disintegrating mill having a. plurality of freely tumbling disintegrating members therein, subjecting the fibrous material to a prolonged pounding treatment between the surfaces of the freely tumbling disintegrating members and the mill as the material travels from the opposite ends toward an intermediate discharge, and mixing and discharging the treated fibrous material received from the opposite ends through the intermediate discharge as fresh fibrous material is fed into the opposite ends thereof.

In testimony whereof I hereto affix my 1" signature.

JOHN TRAQUAIR.

lCf)

CERTIFICATE or CORRECTION. 5

Patent No. 1,914,184. June 13, 1933.

JoIIN rRAoUAI'n.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 93, claim 6, for "extruding" read "extending"; page 4, line 7, claim 10, for "casing" second occurrence read "casings"; and line 78, claim 17, after "casing" insert a comma; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 8th day of August, A. D. 1933.

M. Moore.

Acting Commissioner of Patents. 

